Microchip Technology Humidity Sensor PICtail Spécifications Page 128
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
120
Main Microcontroller
Secondary Microcontroller
Supply Voltage: 3 – 3.6V
Supply Voltage: 1.8 – 3.6V
Up to 40 MIPS
4 Kbytes program memory
Two 40 – bit accumulators
1 SPI port
32/16 and 16/16 divide operations
1 I
2
C port
16 x 16 fractional/integer multiply
operations
1 UART port
256 Kbytes Flash memory
C Language compatible
30 Kbytes RAM
18 programmable I/O pins
85 programmable I/O pins
10 – Bit A/D converter
2 SPI ports
3 timers
2 I
2
C ports
512 bytes RAM
2 UART ports
Table 35 Final microcontroller specs
The main microcontroller that is used in the design requires a supply voltage of 3
– 3.6 V in order to be powered on. It has 85 programmable I/O pins that will be
used as outputs to control relays. It has 2 SPI ports, 2 I
2
C ports, and 2 UART
ports that will be used for interfacing with other components in the main control
units. The 256k bytes of on-board flash memory will be used to store the
programming for the decision making logic and the 512 bytes RAM will run the
program. All programming for the main microcontroller will be done using the C
language.
The secondary microcontroller that is used in the design requires a supply
voltage of 1.8 – 3.6V in order to be powered on. It has 1 SPI port and 1 I
2
C port
that will be used to communicate with the sensor and the ZigBee chip. The
programming will be stored in the 4K bytes program memory and the 512 bytes
RAM will run the program. All programming for the secondary microcontroller will
be done using the C language.
5.7.2 Final Requirements
The sponsor for our project, AC3 Development Group, LLC provided the
requirements for our project. The high level requirements of the system are as
follows. The system is required to sense temperature and relative humidity from
inside and outside a building (residential or commercial), read the settings
determined by the user (inputted via LCD touch screen interface), and make an
- Table of Contents 3
- Table of Figures 6
- Table of Tables 7
- 1.1 Executive Summary 9
- 1.2 Motivation 10
- 1.3 Objective 12
- 1.3.1 Remote Sensing Unit 12
- 1.3.2 Main Control Unit 13
- 1.4.2 Detailed Requirements 14
- 1.5.1 Division of Labor 16
- 1.5.2 Coding Breakdown 18
- 1.6 Block Diagrams 20
- 1.7 Timelines and Milestones 21
- 1.8 Budget / Finances 24
- Section 2: Research 26
- 2.1 Research Methods 26
- 2.2 Main Microcontroller 27
- Input / Output Ports: 28
- Memory Type: 29
- Development tools: 29
- Instructions 30
- 2.2.1 General Description 31
- 2.2.2 Pins 34
- 2.2.3 Interfacing 36
- 2.5 LCD Touch Screen 43
- 2.6 Wireless Interfacing 47
- 2.6.2 Wireless Protocols 48
- 2.6.3 IEEE 802.15.4 – ZigBee 49
- 2.6.4 Bluetooth 50
- 2.6.5 IEEE 802.11 – Wi-Fi 51
- 2.7 Smart Phone Application 53
- 2.7.1 Remote Access 53
- 2.7.2 TCP/IP 54
- 2.7.3 Host-to-Network Layer 54
- 2.7.4 Internet Layer 55
- 2.7.5 Transport Layer 55
- 2.7.6 Application Layer 56
- 2.7.7 Microchip TCP/IP Stack 56
- 2.7.8 Implementation 57
- 2.7.9 Microchip HTTP Server 63
- 2.7.10 Implementation 63
- 2.8 MPFS 66
- 2.9 Mobile Web Site 68
- 2.10 iPhone App 68
- 2.12 Power 70
- User Interface 70
- 2.12.2 Remote Sensing Unit 70
- 2.13 Batteries 71
- 2.15 Dampers 73
- Approx. 4' 74
- 18" 75
- 12" 75
- 24" 75
- 2.16 Sensors 76
- 3.5" 77
- 82
- Wireless Sensor 83
- (MRF24WB0MA) 86
- Sensor 89
- 3.3.1 Sensirion SHT21 89
- C Protocol 90
- 3.5 SLCD5 Controller 95
- Processor 97
- 3.5.2 Touch Interface 98
- Program 98
- Description 99
- Command 99
- Arguments 99
- 3.6 Design Summary 102
- Main Control Unit 103
- Main Control System 105
- Secondary 106
- Microcontroller 106
- 4.1.2 Microchip 108
- Section 4: Prototype 108
- 4.1 Vendors 108
- 4.1.1 Reach Technology Inc 108
- 4.1.3 Sensirion 109
- 4.2 Printed Circuit Board 109
- 4.4 Remote Sensing Unit 116
- 4.5 Relays 117
- 4.6 Demonstration 119
- Section 5: Testing 121
- Daughter Board 123
- 5.4 Safety Considerations 125
- 5.5 Equipment 126
- 5.6 Environment 127
- 5.7.1 Final Specifications 127
- 5.7.2 Final Requirements 128
- Bibliography 135
- *Subject of your message: 140
- *Message: 141
- Reach Technology Permission: 143
- Microchip Permssion: 144
- Contact Us 145
- Thanks very much 146
- 727-580-6767 147
- Abbreviations and Acronyms 149
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